52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to writing, software distributed
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// under the License is distributed on a "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied.
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//
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package embedmd
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"path/filepath"
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"strings"
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)
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// Fetcher provides an abstraction on a file system.
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// The Fetch function is called anytime some content needs to be fetched.
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// For now this includes files and URLs.
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// The first parameter is the base directory that could be used to resolve
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// relative paths. This base directory will be ignored for absolute paths,
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// such as URLs.
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type Fetcher interface {
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Fetch(dir, path string) ([]byte, error)
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}
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type fetcher struct{}
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func (fetcher) Fetch(dir, path string) ([]byte, error) {
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if !strings.HasPrefix(path, "http://") && !strings.HasPrefix(path, "https://") {
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path = filepath.Join(dir, filepath.FromSlash(path))
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return ioutil.ReadFile(path)
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}
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res, err := http.Get(path)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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if res.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("status %s", res.Status)
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}
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return ioutil.ReadAll(res.Body)
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}
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